diff -r 000000000000 -r 4e1aa6a622a0 sysstatemgmt/systemstatemgr/cmn/src/ssmsystemwideproperty.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sysstatemgmt/systemstatemgr/cmn/src/ssmsystemwideproperty.cpp	Tue Feb 02 00:53:00 2010 +0200
@@ -0,0 +1,249 @@
+// Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+//
+
+#include <ssm/ssmsystemwideproperty.h>
+#include "ssmpropertymonitor.h"
+#include "ssmdebug.h"
+#include "cmnpanic.h"
+
+const TUid KSsmServerSid = {0x2000D75B}; //UID3 of sysstatemgr.exe
+
+//
+//---------------- class RSsmSystemWideProperty ------------------
+//
+
+/**
+Connect to the specified System-Wide-Property.
+If the specified property does not yet exist, then this operation will still succeed.
+@param aSwpKey the key(a TUint value) of the System-Wide-Property to connect
+@return KErrNone if successful, otherwise one of the system wide error codes.
+*/
+EXPORT_C TInt RSsmSystemWideProperty::Connect(TUint aSwpKey)
+	{
+	return RSsmSystemWideProperty::Connect(aSwpKey, KSsmServerSid);
+	}  //lint !e1746 Suppress parameter 'aSwpKey' could be made const reference
+
+/**
+ @internalComponent
+ */
+TInt RSsmSystemWideProperty::Connect(TUint aSwpKey, TUid aProcessSid)
+	{
+	iKey = aSwpKey;
+	return iProperty.Attach(aProcessSid, iKey, EOwnerThread);
+	} //lint !e1746 Suppress parameter 'aProcessSid' could be made const reference
+
+/**
+ Close this handle
+ */
+EXPORT_C void RSsmSystemWideProperty::Close()
+	{
+	if(KNullHandle != iProperty.Handle())
+		{
+		iProperty.Cancel();
+		iProperty.Close();
+		}
+	}
+
+/**
+ Reads the value of the connected System-Wide-Property.
+ @param aValue A reference to the variable to store the read value into.
+ @return KErrNone if successful, KErrBadHandle if not connected, otherwise one of the system wide error codes.
+ */
+EXPORT_C TInt RSsmSystemWideProperty::GetValue(TInt& aValue) const
+	{
+	//This function is implemented as "return by reference" because it can't handle
+	//any error returned from RProperty in a sensible way.
+	TInt err = KErrBadHandle;
+	if(iProperty.Handle())
+		{
+		err = const_cast<RProperty&>(iProperty).Get(aValue);
+#ifdef _DEBUG
+		if(KErrNone != err)
+			{
+			DEBUGPRINT3A("RSsmSystemWideProperty::Value read property %d returned error %d", iKey, err);
+			}
+#endif
+		}
+	return err;
+	}
+
+/**
+ Use to get a notification when the value of the connected System-Wide-Property changes
+ @param aStatus The TRequestStatus to be completed when the value gets changed. Will complete
+ 				immediately with KErrBadHandle if no System-Wide-Property is connected.
+ */
+EXPORT_C void RSsmSystemWideProperty::Subscribe(TRequestStatus& aStatus)
+	{
+	if(iProperty.Handle())
+		{
+		iProperty.Subscribe(aStatus);
+		}
+	else
+		{
+		TRequestStatus* status = &aStatus;
+		User::RequestComplete(status, KErrBadHandle);
+		}
+	}
+
+/**
+ Cancel an outstanding @c Subscribe operation.
+ */
+EXPORT_C void RSsmSystemWideProperty::SubscribeCancel()
+	{
+	if(KNullHandle != iProperty.Handle())
+		{
+		iProperty.Cancel();
+		}
+	}
+
+//
+//---------------- class CSsmSystemWideProperty ------------------
+//
+
+/**
+Factory method that returns an instance of this object setup to subscribe
+on changes of the specifed System-Wide-Property. If the specified property
+does not yet exist, then this operation will still succeed.
+
+@param aSwpKey the key(a TUint value) of the System-Wide-Property to subscribe to
+@return KErrNone if successful, otherwise one of the system wide error codes.
+*/
+EXPORT_C CSsmSystemWideProperty* CSsmSystemWideProperty::NewLC(TUint aSwpKey)
+	{
+	CSsmSystemWideProperty* self = new (ELeave) CSsmSystemWideProperty;
+	CleanupStack::PushL(self);
+	self->ConstructL(aSwpKey, KSsmServerSid);
+	return self;
+	} //lint !e1746 Suppress parameter 'aSwpKey' could be made const reference
+
+/**
+Factory method that returns an instance of this object setup to subscribe
+on changes of the specifed System-Wide-Property. If the specified property
+does not yet exist, then this operation will still succeed.
+
+@param aSwpKey the key(a TUint value) of the System-Wide-Property to subscribe to
+@return KErrNone if successful, otherwise one of the system wide error codes.
+*/
+ EXPORT_C CSsmSystemWideProperty* CSsmSystemWideProperty::NewL(TUint aSwpKey)
+ 	{
+ 	CSsmSystemWideProperty* self = CSsmSystemWideProperty::NewLC(aSwpKey);
+ 	CleanupStack::Pop(self);
+ 	return self;
+ 	} //lint !e1746 Suppress parameter 'aSwpKey' could be made const reference
+
+/**
+ @internalComponent
+ */
+CSsmSystemWideProperty* CSsmSystemWideProperty::NewLC(TUint aSwpKey, TUid aProcessSid)
+	{
+	CSsmSystemWideProperty* self = new (ELeave) CSsmSystemWideProperty;
+	CleanupStack::PushL(self);
+	self->ConstructL(aSwpKey, aProcessSid);
+	return self;
+	} //lint !e1746 Suppress parameter 'aProcessSid' could be made const reference
+
+/**
+ @internalComponent
+ */
+void CSsmSystemWideProperty::ConstructL(TUint aSwpKey, TUid aProcessSid)
+	{
+	iMonitor = CSsmPropertyMonitor::NewL(*this, aSwpKey, aProcessSid);
+	} //lint !e1746 Suppress parameter 'aProcessSid' could be made const reference
+
+/**
+ @internalComponent
+ */
+CSsmSystemWideProperty::CSsmSystemWideProperty()
+	{
+	}
+
+/**
+ Destructor
+ */
+EXPORT_C CSsmSystemWideProperty::~CSsmSystemWideProperty()
+	{
+	iSubscribers.Close();
+	delete 	iMonitor;
+	}
+
+/**
+ Reads the value held by the connected System-Wide-Property.
+ @param aSwp A reference to the variable where the read data will be written.
+ @panic ECmnSwpSession1 if an error occurs in RunL
+ @return KErrNone if successful, otherwise one of the system wide error codes.
+ */
+EXPORT_C TInt CSsmSystemWideProperty::GetValue(TSsmSwp& aSwp) const
+	{
+	__ASSERT_DEBUG(iMonitor, User::Panic(KPanicSsmCmn, ECmnSwpSession1));
+	if(iMonitor)
+		{
+		return iMonitor->GetValue(aSwp);
+		}
+	else
+		{
+		return KErrGeneral;
+		}
+	}
+
+/**
+ Register for a callback when the monitored System-Wide-Property changes.
+ @param aSubscriber The object to receive the callback
+ */
+EXPORT_C void CSsmSystemWideProperty::AddSubscriberL(MSwpChangeNotificationSubscriber& aSubscriber)
+	{
+	iSubscribers.AppendL(&aSubscriber);
+	}
+
+/**
+ Cancel callback subscription from the monitored System-Wide-Property.
+ @param aSubscriber The object for which to cancel subsription.
+ */
+EXPORT_C void CSsmSystemWideProperty::RemoveSubscriber(const MSwpChangeNotificationSubscriber& aSubscriber)
+	{
+	const TInt index = iSubscribers.Find(&aSubscriber);
+	if(index > KErrNotFound)
+		{
+		iSubscribers.Remove(index);
+
+		const TInt KDefaultPtrArrayGranularity = 8; // from /cedar/generic/base/e32/common/array.cpp
+		const TInt count = iSubscribers.Count();
+		if((count % KDefaultPtrArrayGranularity) == 0)
+			{
+			iSubscribers.Compress();
+			}
+		}
+	}
+
+/**
+ Called from CSsmPropertyMonitor when the subsribed System-Wide-Property have changed.
+ @internalComponent
+ */
+void CSsmSystemWideProperty::NotifySubscribers(TSsmSwp aSwp)
+	{
+	TInt count = iSubscribers.Count();
+	while (count--)
+		{
+#ifdef _DEBUG
+		TRAPD(err, iSubscribers[count]->SwpChanged(aSwp));
+		if(KErrNone != err)
+			{
+			DEBUGPRINT2A("Illegal leave (leavecode: %d) detected. Will be ignored", err);
+			}
+#else
+		TRAP_IGNORE(iSubscribers[count]->SwpChanged(aSwp));
+#endif
+		}
+	} //lint !e1746 Suppress parameter 'aSwp' could be made const reference
+